Students can download 5th Maths Term 1 Chapter 2 Numbers Ex 2.3 Questions and Answers, Notes, Samacheer Kalvi 5th Maths Guide Pdf helps you to revise the complete Tamilnadu State Board New Syllabus, helps students complete homework assignments and to score high marks in board exams.

## Tamilnadu Samacheer Kalvi 5th Maths Solutions Term 1 Chapter 2 Numbers Ex 2.3

Question 1.

Read the following numbers by placing the commas at appropriate periods and write their number names.

a. 15731997

b. 341964

c. 29121972

d. 347810

Answer:

a. 15731997

15731997 = 1,57,31,997

Number Name: One crore fifty seven lakhs thirty one thousands nine hundred and ninety seven.

b. 341964

341964 = 3,41,964

Number Name: Three lakhs forty one thousands nine hundred and sixty four.

c. 21921972

21921972 = 2,19,21,972

Number Name; Two crores nineteen lakhs twenty one thousands nine hundred and seventy two.

d. 347810

347810 = 3,47,810

Number Name: Three lakhs forty seven thousands eight hundred and ten.

Question 2.

Write the place value of 5 in the following numbers.

a. 287500

b. 586012

c. 5869732

d. 5467859

Answer:

a. 287500

The place value of 5 is 5 × 100 = 500

b. 586012

The place value of 5 is 5 × 1,00,000 = 5,00,000

c. 5869732

The place value of 5 is 5 × 10,00,000 = 50,00,000

d. 5467859

The place value of first 5 is 5 × 10 = 50

The place value of Second 5 is 5 × 10,00,000 = 50 00,000

Question 3.

Write the following in standard notation.

a. 30000 + 3000 + 300 + 30 + 3

b. 200000 + 7000 + 7

c. 8000000 + 70000 + 3000 + 30 + 5

d. 4000000 + 400 + 4

Answer:

a. 30000 + 3000 + 300 + 30 + 3

= 33333 = 33,333

b. 200000 + 7000 + 7

= 207007 = 2,07,007

c. 8000000 + 70000 + 3000 + 30 + 5

= 8073035 = 80,73,035

d. 4000000 + 400 + 4

= 4000404 = 40,00,404

Question 4.

Write the following numbers in expanded form.

a. 63,570

b. 36,01,478

c. 1,45,70,004

d. 28,48,387

Answer:

a. 63,570

= 60000 + 3000 + 500 + 70 + 0

b. 36,01,478

= 3000000 + 600000 + 1000 + 400 + 70 + 8

c. 1,45,70,004

= 10000000 + 4000000 + 500000 + 70000 + 4

d. 28,48,387

= 2000000 + 800000 + 40000 + 8000 + 300 + 80 + 7